GC-MS Analysis on Aromatics of Wanxiang Longans Using Different Extraction Fibers
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摘要: 采用50/30μm DVB/CAR/PDMS、75μm CAR/PDMS和65μm PDMS/DVB 3种固相微萃取头进行‘晚香’龙眼果实香气成分的GC-MS检测分析。结果表明,‘晚香’龙眼在3种萃取头上共检测出香气成分55种,以烯烃类和酯类化合物为主,其中含量较高的香气成分为罗勒烯异构体混合物、乙酸乙酯、酞酸二乙酯;50/30μm DVB/CAR/PDMS萃取头的敏感度最高,对烯烃类和酯类物质的萃取效果最好;75μm CAR/PDMS萃取头的吸附选择性广、检出物质最多;65μm PDMS/DVB的吸附量最低、检测出物质最少。50/30μm DVB/CAR/PDMS和75μm CAR/PDMS萃取头较适用于龙眼香气成分的萃取。Abstract: Aromatic compounds in Wanxiang longans were extracted by using three different solid phase microextraction(SPME)fibers,i.e.,50/30μm DVB/CAR/PDMS,75μm CAR/PDMS,and 65μm PDMS/DVB,on GC-MS analysis for comparison.A total of 55 aromatics were detected.The main volatile components were alkenes and esters,including 1,3,6-Octatriene,3,7-dimethyl-,(Z),ethyl acetate,and diethyl phthalate.The 50/30μm DVB/CAR/PDMS fiber showed a high sensitivity and the best extraction effect on alkenes and esters among three,while 75μm CAR/PDMS had a wide absorption selectivity and the highest amounts of the aromatic compounds.The 65μm PDMS/DVB fiber had the lowest absorption capacity,as well as the least amounts of the target substances for detection.It was concluded that either CAR/PDMS or DVB/CAR/PDMS could be adequately applied for the determination.
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Key words:
- Longan /
- aromatics /
- extraction fiber /
- GC-MS
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